TY  - RPRT
TI  - The inverse problem of refraction travel times, part II: Quantifying refraction nonuniqueness using a three-layer model
AU  - J. Ivanov
AU  - R. D. Miller
AU  - J. Xia
AU  - D. Steeples
PY  - 2005
DO  - 10.1007/s00024-004-2616-0
UR  - https://pubs.usgs.gov/publication/70029114
ID  - 70029114
ER  -